JSCC-Cast: A Joint Source Channel Coding Video Encoding and Transmission System with Limited Digital Metadata.

This work considers the design and practical implementation of JSCC-Cast, a comprehensive analog video encoding and transmission system requiring a reduced amount of digital metadata. Suitable applications for JSCC-Cast are multicast transmissions over time-varying channels and Internet of Things wireless connectivity of end devices having severe constraints on their computational capabilities. The proposed system exhibits a similar image quality compared to existing analog and hybrid encoding alternatives such as Softcast. Its design is based on the use of linear transforms that exploit the spatial and temporal redundancy and the analog encoding of the transformed coefficients with different protection levels depending on their relevance. JSCC-Cast is compared to Softcast, which is considered the benchmark for analog and hybrid video coding, and with an all-digital H.265-based encoder. The results show that, depending on the scenario and considering image quality metrics such as the structural similarity index measure, the peak signal-to-noise ratio, and the perceived quality of the video, JSCC-Cast exhibits a performance close to that of Softcast but with less metadata and not requiring a feedback channel in order to track channel variations. Moreover, in some circumstances, the JSCC-Cast obtains a perceived quality for the frames comparable to those displayed by the digital one.

Changes in Soluble TWEAK Concentrations, but Not Those in Amyloid-ß(1-40), Are Associated with a Decrease in Carotid Intima-Media Thickness after Bariatric Surgery in Obese Women.

BACKGROUND/AIM: Soluble tumor necrosis factor-like weak inducer of apoptosis (sTWEAK) and amyloid-ß(1-40) (Aß40) emerged as markers of cardiovascular risk because of their actions in the endothelium and their role in atherosclerotic progression. The aim of this study was to analyze the association of these two factors with the decrease in carotid intima-media thickness (cIMT) after bariatric surgery in obese women. METHODS: We studied 60 severely obese women, of whom 20 were submitted to laparoscopic Roux-en-Y gastric bypass (RYGB), 20 to sleeve gastrectomy (SG), and 20 to lifestyle modification therapy. Circulating sTWEAK, Aß40, high-sensitivity C-reactive protein, plasminogen activator inhibitor type 1, insulin resistance (HOMA-IR), and cIMT were measured at baseline and after 1 year of follow-up. RESULTS: sTWEAK increased similarly after both surgical procedures, whereas the increase observed after lifestyle intervention did not reach statistical significance. Aß40 showed no differences between groups of women, nor did it change during follow-up. The decrease in cIMT at 12 months correlated with the decrease in body mass index (BMI) (r = 0.45; p < 0.001) and fasting insulin (r = 0.30; p = 0.038), and also with the increase in sTWEAK (r = -0.43; p = 0.002). Multivariate linear regression showed that only the changes in BMI (ß = 0.389; p = 0.005) and sTWEAK (ß = -0.358; p = 0.009) were associated with the decrease in cIMT (R2 = 0.313; F = 9.348; p < 0.001). CONCLUSIONS: One year after bariatric surgery, RYGB and SG induced a similar increase in circulating sTWEAK that occurred in parallel to the decrease observed in cIMT.

Transmission of Still Images Using Low-Complexity Analog Joint Source-Channel Coding.

An analog joint source-channel coding (JSCC) system designed for the transmission of still images is proposed and its performance is compared to that of two digital alternatives which differ in the source encoding operation: Joint Photographic Experts Group (JPEG) and JPEG without entropy coding (JPEGw/oEC), respectively, both relying on an optimized channel encoder-modulator tandem. Apart from a visual comparison, the figures of merit considered in the assessment are the structural similarity (SSIM) index and the time required to transmit an image through additive white Gaussian noise (AWGN) and Rayleigh channels. This work shows that the proposed analog system exhibits a performance similar to that of the digital scheme based on JPEG compression with a noticeable better visual degradation to the human eye, a lower computational complexity, and a negligible delay. These results confirm the suitability of analog JSCC for the transmission of still images in scenarios with severe constraints on power consumption, computational capabilities, and for real-time applications. For these reasons the proposed system is a good candidate for surveillance systems, low-constrained devices, Internet of things (IoT) applications, etc.

Circulating adiponectin increases in obese women after sleeve gastrectomy or gastric bypass driving beneficial metabolic changes but with no relationship with carotid intima-media thickness.

BACKGROUND & AIMS: Obesity surgery induces beneficial effects in metabolic and cardiovascular parameters. Adiponectin increase might be associated with some of these changes. However, direct comparison between different surgical techniques has not been extensively performed. METHODS: We studied 20 obese women submitted to laparoscopic Roux en Y gastric bypass (RYGB) and 20 to sleeve gastrectomy (SG). Twenty control women matched for age and baseline metabolic profiles were also included. Both patients and controls were followed up for one year after surgery or conventional treatment with diet and exercise, respectively. Serum adiponectin was measured at baseline, 6 months and 1 year after, as well as lipid profiles, sex hormone binding globulin (SHBG), fasting glucose and insulin. Carotid intima-media thickness was measured by ultrasonography at baseline and after 1 year. RESULTS: Circulating adiponectin increased after obesity surgery (more markedly following RYGB than after SG), whereas no changes were observed in the controls (Wilks' λ = 0.659, P < 0.001 for the interaction, P < 0.001 for RYGB vs. controls, P = 0.016 for SG vs. controls, P = 0.040 for RYGB vs. SG). The percentage increment in adiponectin correlated positively with changes in SHBG (r = 0.404, P = 0.002) and negatively with changes in weight (r = -0.531, P < 0.001), waist circumference (r = -0.426, P = 0.001), fasting glucose (r = -0.356, P = 0.006), and insulin (r = -0.496, P < 0.001). No correlation was found with carotid intima-media thickness (r = -0.055, P = 0.679). CONCLUSIONS: RYGB induces a higher increase in adiponectin than SG, which parallels SHBG, the reduction of fasting insulin and insulin resistance. On the other hand, no association was found with carotid intima-media, lipid profiles or blood pressure.

Improvement in cardiovascular risk in women after bariatric surgery as measured by carotid intima-media thickness: comparison of sleeve gastrectomy versus gastric bypass.

BACKGROUND: Bariatric surgery may diminish cardiovascular risk (CVR) and its associated mortality. However, studies that compare these effects with different techniques are scarce. OBJECTIVE: To evaluate the changes in CVR as estimated by carotid intima-media thickness (IMT) after obesity surgery in women with high CVR as defined by the presence of metabolic syndrome. SETTING: Academic hospital. METHODS: We studied 40 severely obese women, of whom 20 received laparoscopic Roux en Y gastric bypass (RYGB) and 20 received sleeve gastrectomy (SG). Twenty control women matched for age and cardiovascular risk were also included. Patients and controls were evaluated at baseline and 1 year after surgery or conventional treatment with diet and exercise, respectively. Only 18 of the 20 women in the control group were available for analysis after 1 year. None of the women who had bariatric surgery was lost to follow-up. RESULTS: Mean carotid IMT decreased 1 year after surgery irrespective of the surgical technique used, whereas no changes were observed in the control women who had conventional therapy (Wilks´ λ = .802, P = .002 for the interaction, P = .011 for RYGB versus controls, P = .002 for SG versus controls, P = .349 for RYGB versus SG). CONCLUSION: Both RYGB and SG decrease CVR as measured by carotid IMT in obese women.

Serum Bioavailable Vitamin D Concentrations and Bone Mineral Density in Women After Obesity Surgery.

INTRODUCTION: Low bone mass after obesity surgery may arise as a consequence of chronic malabsorption of calcium and vitamin D. However, we have not found any role of serum 25-hydroxyvitamin D or of polymorphisms in the vitamin D receptor gene in previous studies. PURPOSE: To investigate the circulating bioavailable 25-hydroxyvitamin D in women after bariatric procedures and its association with bone mass. PATIENTS AND METHODS: The study consisted of 91 women on follow-up for 7 ± 2 years after bariatric surgery. We measured bone mineral density (BMD), serum parathormone (PTH), 25-hydroxyvitamin D, and vitamin D binding protein (VDBP). All patients were genotyped for two variants in the coding region of VDBP (rs4588 and rs7041). Bioavailable 25-hydroxyvitamin D was calculated in double homozygotes. RESULTS: We found a negative correlation between bioavailable 25-hydroxyvitamin D and PTH (r = -0.373, P = 0.018), but not with BMD at lumbar spine (r = -0.065, P = 0.682) or hip (r = -0.029, P = 0.857). When adjusting by age, similar results were found for PTH (r = -0.441, P = 0.005), BMD at lumbar spine (r = -0.026, P = 0.874) and hip (r = -0.096, P = 0.561). After multivariate linear regression, forcing bioavailable 25-hydroxyvitamin D into the model resulted in a weak significant association with BMD at the lumbar spine (ß = - 0.247, P = 0.025). CONCLUSIONS: Serum bioavailable 25-hydroxyvitamin D concentrations are not associated with bone mass loss after bariatric surgery in women. The negative association with serum PTH levels suggests that vitamin D supplementation partly improves secondary hyperparathyroidism, yet other mechanisms may contribute to low bone mass after bariatric surgery.

The role of serum osteoprotegerin and receptor-activator of nuclear factor-κB ligand in metabolic bone disease of women after obesity surgery.

Metabolic bone disease may appear as a complication of obesity surgery. Because an imbalance in the osteoprotegerin and receptor-activator of nuclear factor-κB ligand system may underlie osteoporosis, we aimed to study this system in humans in the metabolic bone disease occurring after obesity surgery. In this study we included sixty women with a mean age of 47 ± 10 years studied 7 ± 2 years after bariatric surgery. The variables studied were bone mineral density, ß-isomer of C-terminal telopeptide of type I collagen cross-links (a bone resorption marker), the bone formation markers osteocalcin and N-terminal propeptide of procollagen 1, serum osteoprotegerin and receptor-activator of nuclear factor-κB ligand. Serum osteoprotegerin inversely correlated with the bone remodeling markers osteocalcin, ß-isomer of C-terminal telopeptide of type I collagen cross-links and N-terminal propeptide of procollagen 1. The osteoprotegerin and receptor-activator of nuclear factor-κB ligand ratio also correlated inversely with serum parathormone and osteocalcin. Bone mineral density at the lumbar spine was associated with age (ß = -0.235, P = 0.046), percentage of weight loss (ß = 0.421, P = 0.001) and osteoprotegerin and receptor-activator of nuclear factor-κB ligand ratio (ß = 0.259, P = 0.029) in stepwise multivariate analysis (R 2 = 0.29, F = 7.49, P < 0.001). Bone mineral density at the hip site was associated only with percentage of weight loss (ß = 0.464, P < 0.001) in stepwise multivariate regression (R 2 = 0.21, F = 15.1, P < 0.001). These data show that the osteoprotegerin and receptor-activator of nuclear factor-κB ligand system is associated with bone markers and bone mineral density at the lumbar spine after obesity surgery.

Phase IV prospective clinical study to evaluate the effect of taurine on liver function in postsurgical adult patients requiring parenteral nutrition.

BACKGROUND: Taurine's role in bile acid metabolism and anti-inflammatory activity could exert a protective effect on hepatobiliary complications associated with parenteral nutrition (PN). In this study, the effects of 2 amino acid solutions, with and without taurine, on liver function administered to nonacutely ill postsurgical patients as part of a short-term PN regimen were prospectively compared. METHODS: Adult patients randomly received (double-blind) Tauramin 10% or a standard PN solution without taurine as the control (1.5 g amino acid/kg body weight [bw]/d; infusion rate of ≤4 mg glucose/kg bw/d) for a period of 5-30 days. γ-Glutamyl transpeptidase (GGT) and other indicators of liver function, glucose metabolism, lipid profile, inflammation markers, and treatment safety data were collected. RESULTS: Thirty-five patients receiving taurine PN and 39 receiving control PN were enrolled (intention-to-treat [ITT] population). Most patients (n = 62) discontinued after day 7 of follow-up (per-protocol [PP] population: n = 24 and n = 27, respectively). ITT patients with high GGT values after 5 days of PN comprised 68.6% and 64.1%, respectively. The mean change in GGT values with respect to the baseline values was 167 ± 192 and 157 ± 185 IU/L, respectively. Low-density lipoprotein (LDL) cholesterol levels after 7 days of PN were significantly decreased in the taurine PN group of PP patients (-2.83 ± 30.9 vs 23.9 ± 27.0 mg/dL for control PN; P < .05). None of the adverse events reported (taurine PN: n = 6; control PN: n = 7) were treatment related. CONCLUSION: PN solutions with and without taurine had similar effects on liver function parameters, except for an LDL reduction in PN with taurine, when administered to nonacutely ill postsurgical patients in the short term (5-7 days).

Estimación del impacto económico y sanitario de las complicaciones de la diabetes mellitus tipo 2 en la Comunidad de Madrid / Estimation of the economic and health impact of complications of type 2 diabetes mellitus in the autonomous community of Madrid (Spain)

OBJETIVO: Estimar el impacto económico y sanitario de las complicaciones crónicas macro y microvasculares de la diabetes mellitus tipo 2 (DM2) en la Comunidad de Madrid (CM). MÉTODOS: El número de complicaciones esperadas se obtuvo de un estudio descriptivo transversal que incluyó una cohorte de 3.268 pacientes con DM2 de la CM. El coste de las complicaciones (Euros de 2012) se valoró tanto a nivel hospitalario como en la atención primaria. El número de consultas médicas en atención primaria y el tratamiento farmacológico de las complicaciones se obtuvo mediante un panel de 21 médicos con experiencia en el tratamiento de la DM2. Los datos poblacionales, epidemiológicos y los costes sanitarios se consiguieron de fuentes españolas. Se hicieron análisis de sensibilidad univariantes. RESULTADOS: Se estima que la población con DM2 en la CM asciende a 390.944 pacientes y que estos sufren a lo largo de su vida 172.406 y 212.283 complicaciones macro y microvasculares, respectivamente. El coste promedio de las complicaciones de la DM2 por paciente se calcula en 4.121,54 € (el 66% debido a las complicaciones macrovasculares). El impacto económico de las complicaciones de la DM2 en la CM sería de 1.611 millones de euros (1.065 en las complicaciones crónicas de tipo macrovascular y 545 en las complicaciones de tipo microvascular). El impacto económico oscilaría entre los 1.249 y los 2.509 millones de euros, según la prevalencia de DM2. CONCLUSIONES: Las complicaciones de la DM2 tienen un gran impacto, tanto sanitario como económico en la CM

OBJECTIVE: To estimate the economic and health impact of chronic complications (macrovascular and microvascular) of type 2 diabetes mellitus (T2DM) in the autonomous community of Madrid (Spain) (ACM). METHODS: The number of expected complications was obtained from a descriptive, cross-sectional study on a cohort of 3,268 patients with T2DM from the ACM. Cost of complications (Euros, 2012) was assessed both at hospitals and in primary care. The number of medical visits in primary care and drug treatment for complications were collected by a panel of 21 physicians experienced in treatment of T2DM. Population and epidemiological data and healthcare costs were obtained from Spanish sources. Univariate sensitivity analyses were performed. RESULTS: It is estimated that there are 390,944 patients with T2DM in the ACM, and that they experience 172,406 and 212,283 macrovascular and microvascular complications respectively during their lifetimes. Mean cost of T2DM complications per patient is estimated at Euros 4,121.54 (66% due to macrovascular complications). The economic impact of T2DM complications in the ACM would be € 1,611 million (1,065 and 545 millions from macrovascular and microvascular complications respectively). The economic impact would range from Euros 1,249 and 2.509 million euro depending on T2DM prevalence. CONCLUSIONS: Complications of T2DM have a great health and economic impact in ACM

Estimation of the economic and health impact of complications of type 2 diabetes mellitus in the autonomous community of Madrid (Spain).

OBJECTIVE: To estimate the economic and health impact of chronic complications (macrovascular and microvascular) of type 2 diabetes mellitus (T2DM) in the autonomous community of Madrid (Spain) (ACM). METHODS: The number of expected complications was obtained from a descriptive, cross-sectional study on a cohort of 3,268 patients with T2DM from the ACM. Cost of complications (€, 2012) was assessed both at hospitals and in primary care. The number of medical visits in primary care and drug treatment for complications were collected by a panel of 21 physicians experienced in treatment of T2DM. Population and epidemiological data and healthcare costs were obtained from Spanish sources. Univariate sensitivity analyses were performed. RESULTS: It is estimated that there are 390,944 patients with T2DM in the ACM, and that they experience 172,406 and 212,283 macrovascular and microvascular complications respectively during their lifetimes. Mean cost of T2DM complications per patient is estimated at € 4,121.54 (66% due to macrovascular complications). The economic impact of T2DM complications in the ACM would be € 1,611 million (1,065 and 545 millions from macrovascular and microvascular complications respectively). The economic impact would range from € 1,249 and 2.509 million euro depending on T2DM prevalence. CONCLUSIONS: Complications of T2DM have a great health and economic impact in ACM.

Metabolic control and chronic complications during a 3-year follow-up period in a cohort of type 2 diabetic patients attended in primary care in the Community of Madrid (Spain) / Control metabólico y complicaciones crónicas durante un período de 3 años en una cohorte de pacientes diabéticos tipo 2 atendidos en asistencia primaria en la Comunidad de Madrid (España)

BACKGROUND: Our aim was to analyze both metabolic control and chronic complications of type 2 diabetes mellitus (T2D) patients regularly attended in primary care during a 3 years of follow-up in the Community of Madrid (Spain). METHODS: From 2007 to 2010 we prospectively included 3268 patients with T2D attended by 153 primary care physicians from 51 family health centers. An prospective cohort study with annual evaluation over 3 years to the same population was performed. We measured the goals of control in diabetic patients and the incidence of chronic complications of diabetes during the study period. RESULTS: A significant decrease in serum glucose levels (143 ± 42 mg/dl vs 137 ± 43 mg/dl, p < 0.00), HbA1c (7.09 ± 1.2% vs 7.02 ± 1.2%, p < 0.00), total cholesterol (191.4 ± 38 mg/dl vs 181.5 ± 36 mg/dl, p < 0.00), LDL cholesterol (114.7 ± 31 mg/dl vs 105.5 ±30 mg/dl, p < 0.00) and triglyceride levels (144.5 ± 93 mg/dl vs 138 ± 84 mg/dl, p < 0.00) during study period was documented. On the contrary, a significant elevation in HDL cholesterol levels was observed (49.2 ± 14 mg/dl vs 49.9 ± 16 mg/dl, p < 0.00). The incidence of diabetic complications throughout the study period was low, with a incidence of coronary heart disease of 6.2%, peripheral arterial disease 3%, ischemic stroke 2.8%, diabetic foot 11.2%, nephropathy 5.9%, retinopathy 4.5%, and neuropathy 3%. CONCLUSION: Metabolic control in T2D patients attended in primary care in the Community of Madrid throughout 3 years is adequate and is accompanied by low percent of chronic diabetic complications during this period of follow-up

ANTECEDENTES: Nuestro objetivo ha sido analizar el control metabólico y las complicaciones crónicas de pacientes con diabetes mellitus tipo 2 (DM2) que acudían regularmente a consultas de asistencia primaria durante 3 años de seguimiento en la Comunidad de Madrid (España). MÉTODOS: Desde 2007 a 2010, 153 médicos de asistencia primaria de 51 centros de salud familiares incluyeron prospectivamente 3268 pacientes con DM2. Se realizó un estudio de cohorte prospectivo con evaluación anual de la misma población durante 3 años. Se determinaron los objetivos de control y la incidencia de complicaciones crónicas de la diabetes. RESULTADOS: Se comprobaron descensos significativos de los niveles séricos de glucosa (143 ± 42 mg/dl frente a 137 ± 43 mg/dl, p < 0,00), HbA1c (7,09 ± 1,2% frente a 7,02 ± 1,2%, p < 0,00), colesterol total (191,4 ± 38 mg/dl frente a 181,5 ± 36 mg/dl, p < 0,00), colesterol LDL (114,7 ±31 mg/dl frente a 105,5 ± 30 mg/dl, p < 0,00) y triglicéridos (144,5 ± 93 mg/dl frente a 138 ± 84 mg/dl, p < 0,00) durante el período del estudio. Por el contrario, se observó una elevación significativa de los niveles de colesterol HDL (49,2 ± 14 mg/dl frente a 49,9 ± 16 mg/dl, p < 0,00). La incidencia de complicaciones diabéticas durante el período del estudio fue baja: enfermedad coronaria 6,2%, enfermedad arterial periférica 3%, ictus isquémico 2,8%, pie diabético 11,2%, nefropatía 5,9%, retinopatía 4,5% y neuropatía 3%. CONCLUSIÓN: El control metabólico de los pacientes con DM2 atendidos en asistencia primaria en la Comunidad de Madrid durante 3 años era adecuado e iba acompañado de un porcentaje bajo de complicaciones crónicas durante este período de seguimiento

Metabolic control and chronic complications during a 3-year follow-up period in a cohort of type 2 diabetic patients attended in primary care in the Community of Madrid (Spain).

BACKGROUND: Our aim was to analyze both metabolic control and chronic complications of type 2 diabetes mellitus (T2D) patients regularly attended in primary care during a 3 years of follow-up in the Community of Madrid (Spain). METHODS: From 2007 to 2010 we prospectively included 3268 patients with T2D attended by 153 primary care physicians from 51 family health centers. An prospective cohort study with annual evaluation over 3 years to the same population was performed. We measured the goals of control in diabetic patients and the incidence of chronic complications of diabetes during the study period. RESULTS: A significant decrease in serum glucose levels (143±42mg/dl vs 137±43mg/dl, p<0.00), HbA1c (7.09±1.2% vs 7.02±1.2%, p<0.00), total cholesterol (191.4±38mg/dl vs 181.5±36mg/dl, p<0.00), LDL cholesterol (114.7±31mg/dl vs 105.5±30mg/dl, p<0.00) and triglyceride levels (144.5±93mg/dl vs 138±84mg/dl, p<0.00) during study period was documented. On the contrary, a significant elevation in HDL cholesterol levels was observed (49.2±14mg/dl vs 49.9±16mg/dl, p<0.00). The incidence of diabetic complications throughout the study period was low, with a incidence of coronary heart disease of 6.2%, peripheral arterial disease 3%, ischemic stroke 2.8%, diabetic foot 11.2%, nephropathy 5.9%, retinopathy 4.5%, and neuropathy 3%. CONCLUSION: Metabolic control in T2D patients attended in primary care in the Community of Madrid throughout 3 years is adequate and is accompanied by low percent of chronic diabetic complications during this period of follow-up.

Role of peripherally inserted central catheters in home parenteral nutrition: a 5-year prospective study.

BACKGROUND: Home parenteral nutrition (HPN) has become a common therapy, with tunneled central venous catheters (CVCs) being preferred for its administration. Peripherally inserted central catheters (PICCs) are not currently recommended for long-term HPN, although evidence to support this statement is scarce. The authors aimed to evaluate the outcomes of HPN, focusing on CVC-related complications. MATERIALS AND METHODS: All patients attended at the authors' center for HPN from 2007-2011 were prospectively included. HPN composition aimed at 20-35 kcal/kg/d, 3-6 g/kg/d of glucose, 1.0 g/kg/d of amino acids, and <1 g/kg/d of lipids. HPN was infused in an intermittent schedule, mostly at night. Catheter-related bloodstream infections (CRBSIs) were confirmed with positive semi-quantitative or quantitative culture of the catheter or simultaneous differential blood cultures drawn through the CVC and peripheral vein. RESULTS: Seventy-two patients received HPN, with 79 implanted CVCs (48 PICCs, 10 Hickman, and 21 ports). Mean catheter-days were 129.1 for PICCs, 98.5 for Hickman, and 67.7 for ports (P = .685). When analyzing CRBSIs, ports had 44, Hickman had 20, and PICC had 0 episodes per 1000 catheter-days (P = .078). Only PICCs showed less incidence of CRBSIs vs ports (P = .043). Multivariate logistic regression, correcting by catheter-days, patients' age and sex, underlying disease, and type of catheter, showed that only catheter-days (P = .031) was a predictor for CRBSIs (P = .007, Nagelkerke R= = 0.246). CONCLUSION: PICCs are similar in terms of catheter-related complications to other CVCs for the administration of HPN, especially for oncology patients with HPN lasting <6 months.

Fe de errores de «Estudio descriptivo de la evolución clínico-asistencial de la población con diabetes tipo 2 en la Comunidad de Madrid. Estudio de seguimiento diabético tipo 2» / Erratum to “Descriptive study on the outcome of clinical care of the type 2 diabetes population in the Community of Madrid. Type 2 diabetes follow-up (ESD-2)”

No disponible

Insulin action in adipose tissue in type 1 diabetes.

BACKGROUND: Insulin action has been reported to be normal in type 1 diabetic patients. However, some studies have reported an insulin resistance state in these patients. The aim of this study was to investigate insulin resistance in a group of type 1 diabetic patients. We studied the insulin action in adipose tissue and analyzed the effects of duration of disease, body mass index (BMI), and glycosylated hemoglobin on insulin action at the receptor and postreceptor levels in adipocytes. METHODS: Nine female type 1 diabetic patients with different durations of disease and eight nondiabetic female patients of comparable age and BMI were studied. (125)I-insulin binding and U-[(14)C]-D-glucose transport was measured in a sample of subcutaneous gluteus adipose tissue obtained by open surgical biopsy from each subject. RESULTS: The duration of disease was negatively correlated with both (125)I-insulin binding capacity (r = -0.70, P < 0.05) and basal and maximum insulin-stimulated glucose transport (r = -0.87, P < 0.01, and r = -0.88, P < 0.01, respectively). Maximum specific (125)I-insulin binding to the receptors in adipocytes was higher in the group of patients with a shorter duration of disease (P < 0.01). Basal and maximum insulin-stimulated glucose transport was significantly higher in the group with less than 5 years of disease (P < 0.01). No correlation was found between BMI and insulin action. CONCLUSION: Female type 1 diabetic patients have normal insulin action. There is a high glucose uptake in the early phase of the disease, although a longer duration of disease appears to be a contributing factor to a decrease in insulin action in these patients, and involving both receptor and postreceptor mechanisms.

Estudio descriptivo de la evolución clínico-asistencial de la población con diabetes tipo 2 en la Comunidad de Madrid. Estudio de seguimiento diabético tipo 2 (ESD-2) / Descriptive study on the outcome of clinical care of the type 2 diabetes population in the Community of Madrid. Type 2 diabetes follow-up (ESD-2)

Objetivos. El objetivo del estudio es conocer el grado de control de los factores de riesgo cardiovascular y la prevalencia de complicaciones crónicas de la población con diabetes mellitus tipo 2 (DM2) en la Comunidad de Madrid, en condiciones habituales de práctica asistencial diaria durante 3 años de seguimiento. Materiales y métodos. Para ello, hemos realizado un estudio epidemiológico, transversal y descriptivo, de los pacientes con DM2 seguidos en 51 centros de salud, con la participación de 134 profesionales sanitarios de todas las áreas sanitarias de la Comunidad de Madrid. La muestra se obtuvo mediante muestreo sistemático. Analizamos variables sociodemográficas, biológicas/ bioquímicas, de resultado y de procesos asistenciales. El tratamiento estadístico de los datos se realizó mediante el programa de análisis estadístico SPSS 15.0. Resultados. La muestra de pacientes estudiados estuvo constituida por 3.268 pacientes. El 50,3% eran varones y el 49,7%, mujeres, con una edad media de 68,8 ± 10,9 años, y un tiempo medio de evolución de diabetes mellitus de 7,9 ± 7,4 años y mediana de 6 años. Los resultados de comorbilidad mostraron principalmente que el 70,4% tenía la presión arterial elevada, y el 48,4%, obesidad. La presión arterial sistólica media fue de 131,7 ± 14,5 mmHg, y en el 35,3% de los diabéticos fue menor de 130 mmHg. La presión arterial diastólica media fue de 76,1± 9 mmHg, y en el 51,4% de los pacientes estaba por debajo de los 80 mmHg. El 25,3% tenía una presión arterial sistólica/diastólica por debajo de 130/80 mmHg. Es de destacar la elevada prevalencia de complicaciones macrovasculares con un 18,3%, sin diferencias en la prevalencia de complicaciones crónicas de la diabetes mellitus señaladas por la bibliografía, salvo en la retinopatía con una prevalencia del 8%, probablemente por ser el proceso asistencial de registro más bajo(AU)

Conclusiones. El grado de control integral (hemoglobina glucosilada < 7%, lipoproteínas de baja densidad < 100 y presión arterial < 130/80 mmHg) sólo lo alcanza el 4,5% de la población. En nuestro estudio son evidentes las dificultades de alcanzar un control integral del paciente con DM2(AU)

Aims. To study the level of control of cardiovascular risk factors, and prevalence of chronic complications in type 2 diabetic (T2D) patients in daily practice in the Community of Madrid. Design. An epidemiological cross-sectional study in T2D patients attending 51 general practitioner clinics, with the participation of 134 health professionals from all the health areas in the Madrid Community. The sample was obtained by systematic sampling. Measurements. Sociodemographic, biological/biochemical processes and outcomes of the clinical care were recorded. For the statistical analysis the software SPSS 15.0 was used. Results. A total of 3268 T2D patients were studied, 50.3% men and 49.7% women, mean age 68.8±10.9 years, and with a mean duration of diabetes of 7.9±7.4 years and a median of 6 years. High blood pressure was observed in 70.4% of T2D patients, and 48.4% were obese. Mean systolic blood pressure was 131.7±14.5 mmHg, and 35.3% of patients had a systolic pressure less than 130 mmHg. Mean diastolic pressure was 76.1±9 mmHg, and in 51.4% of the patients it was below 80 mmHg. A systolic/diastolic blood pressure below 130/80 mmHg was found in 25.3% of T2D patients. A high prevalence of macrovascular complications (18.3%) was found in our study. No differences in the prevalence was found for chronic complications of diabetes compared with that previously published, except for retinopathy, with a prevalence of 8% in our study, probably reflecting a low case register. Conclusions. The level of integrated control in T2D (HbA1C < 7%, LDL < 100 and BP < 130/80 mmHg), was only observed in 4.5% of the patients. The study shows the difficulty of achieving integral control of T2D patients(AU)

Copper and zinc serum levels after derivative bariatric surgery: differences between Roux-en-Y Gastric bypass and biliopancreatic diversion.

BACKGROUND: There are limited data on the prevalence of copper and zinc deficiency in the long term after bariatric surgery. METHODS: We analysed copper and zinc serum levels in a cohort of 141 patients, 52 who underwent Roux-en-Y gastric bypass (RYGB) and 89 biliopancreatic diversion (BPD), with a follow-up of 5 years. RESULTS: Mean copper level was significantly lower in the BPD group (P < 0.0001 vs. RYGB). Forty-five (50.6%) BPD patients had, at least once, a low copper level, and half of them, 27 (30.3%) patients, had repeatedly low levels. In this group, serum copper level correlated positively with total leukocyte and granulocyte count (r = 0.14, P = 0.002, and r = 0.17, P < 0.001, respectively). However, no patient had clinical evidence of haematological or neurological disorders. Only two RYGB patients (3.8%) had copper deficiency. Mean zinc level was also significantly lower in the BPD group (P < 0.0001). All but one BPD patient had hypozincaemia at least once, and the percentage of patients with hypozincaemia ranged from 44.9% to 74.2%. In RYGB patients, zinc deficiency peaked at 48 and 60 months (15.4% and 21.2%, respectively). The zinc level was determined by the alimentary limb length in this group, but the common channel length had no influence on copper and zinc levels in the BPD group. CONCLUSIONS: Hypocupremia, and especially hypozincaemia, are frequent findings in BPD patients, but rarely found in patients who underwent RYGB, particularly short RYGB. Our data also suggest that a long-standing and severe hypocupremia is required to develop neurological and haematological disorders after bariatric surgery.

Vitamin D receptor polymorphisms in secondary hyperparathyroidism after Scopinaro's biliopancreatic diversion.

BACKGROUND: Secondary hyperparathyroidism is a frequent metabolic complication of bariatric surgery. Individual differences in calcium absorption determine chronic secondary hyperparathyroidism after biliopancreatic diversion in half of the patients who have normal levels of 25-hydroxyvitamin D. We aimed to evaluate if certain vitamin D receptor polymorphisms may be responsible for the latter. Cases and controls study including 57 patients after biliopancreatic diversion with a mean serum 25-hydroxyvitamin D above 20 ng/mL, separated into those with secondary hyperparathyroidism (n = 26, cases) and those without it (n = 31, controls). METHODS: Genotyping for restriction-length-fragment polymorphisms of the vitamin D receptor gene was carried out for FOK1, BSM1, APA1, and TAQ1, and haplotype structure was also constructed. RESULTS: There were no differences in the allelic or genotypes distribution of the four studied polymorphisms between patients and controls (P = 0.352 and P = 0.301 for FOK1, P = 0.733 and P = 0.924 for BSM1, P = 0.974 and P = 0.992 for APA1, and P = 0.995 and P = 0.928 for TAQ1, respectively). Haplotype analysis showed no differences between patients and controls (P = 0.495 for BAT, P = 1.000 for BAt, P = 0.508 for Bat and P = 0.924 for bAT haplotypes, respectively). Furthermore, haplotypes were not associated with serum PTH levels or with the ratio between serum PTH and 25-hydroxyvitamin D levels. CONCLUSION: Chronic secondary hyperparathyroidism after biliopancreatic diversion in patients with normal levels of 25-hydroxyvitamin D is not dependent on vitamin D receptor gene polymorphisms.

Perioperative oral nutritional supplements in normally or mildly undernourished geriatric patients submitted to surgery for hip fracture: a randomized clinical trial.

BACKGROUND: Oral nutritional supplements have been recommended after orthopedic surgery in geriatric patients. This has been shown to be effective even in normally nourished or mildly undernourished geriatric patients. Whether perioperative administration of these products is also effective and suitable is not known. METHODS: Randomized, controlled, open, paralleled two-arms clinical trial, comparing energy-protein supplements (40 g of protein and 400 kcal per day), with no intervention in normally nourished or mildly undernourished patients. Outcomes were serum proteins, body mass index, postoperative complications among others. RESULTS: 60 Elderly patients were included. Patients in the intervention group (n = 30) ingested 52.2 ± 12.1% of the prescribed supplements per day for 5.8 ± 1.8 days before surgery and until hospital discharge. There was a significant change in serum albumin at follow-up (F = 22.536, P < 0.001), and between the two groups (F = 5.763, P = 0.002), favouring the intervention. The same was observed for serum prealbumin (F = 6.654, P = 0.001 within subjects, F = 2.865, P = 0.045 for interaction). Logistic regression showed that only supplemented proteins per day (OR[95%CI] = 0.925[0.869-0.985]) were associated with less postoperative complications (R(2) = 0.323, χ(2) = 11.541, P = 0.003). CONCLUSION: Perioperative supplements in geriatric patients with hip fracture submitted to surgery showed better recovery of plasma proteins. Higher daily protein intakes were associated with less postoperative complications.

Chronic increase of bone turnover markers after biliopancreatic diversion is related to secondary hyperparathyroidism and weight loss. Relation with bone mineral density.

BACKGROUND: Biliopancreatic diversion (BPD) is the most effective bariatric procedure. Around 70% of these patients have secondary hyperparathyroidism (SH) in the long term as a consequence of calcium and vitamin D malabsorption. This work was aimed to study the influence of SH on bone turnover and its relationship with bone mineral density (BMD). METHODS: Bone turnover markers were determined in 63 BPD patients and 34 morbidly obese controls. In the BPD group, we also studied the influence of age, loss of weight, common channel length, PTH, vitamin D, and serum calcium on bone turnover as well as its relation with BMD. RESULTS: BPD patients showed significantly higher PTH, osteocalcin, and beta-CTx levels than controls. In the multivariate regression analysis, only PTH (beta=0.42; P=0.0002), menopausal status (beta=0.31; P=0.007) and the percentage of lost BMI (beta=-0.24; P=0.03) significantly predicted the osteocalcin level (R2=0.33; F=9.56; P<0.0001). Similarly, only PTH (beta=0.39; P=0.0005), menopausal status (beta=0.37; P=0.001) and the percentage of lost BMI (beta=-0.23; P=0.04) significantly predicted the beta-CTx level (R2=0.33; F=9.82; P<0.0001). Osteocalcin and beta-CTx levels correlated negatively with BMD at lumbar spine (r=-0.38, P=0.002 and r=-0.30, P=0.02, respectively). CONCLUSIONS: Chronic SH and the loss of weight determine a high rate of bone turnover that is associated with decreasing BMD in BPD patients.